Overland Journal calls overlanding "Vehicle Based Travel". I think it is that, but it is also much more. It is the cars, the kit, the places, the people, and the adventure. Whether I have my Jeep near on its side or I am hghwaying from Vancouver to Calgary as long as I can see something I have never seen before, or try something different, or get a little out of my comfort zone it can be turned into an adventure and if a vehicle is involved for me, it is "Overlanding".
Obviously, Gaia on an iPhone or iPad or phone or tablet of your choice can help you find out where you are, see the terrain around you, and help you to find your way. My real love for Gaia is on my computer, at work..... don't tell my boss. Like now, its 2 pm on a Friday afternoon. There are very few things I love more than staring at maps and daydreaming about the next big trip or the next weekend run or a couple of hours of adventure. It's been a long week, I have a couple of hours to go before the weekend and I love browsing maps, plotting routes and waypoints, and daydreaming about the next big (or small) adventure.